--TEST--
Bug #77191: Assertion failure in dce_live_ranges() when silencing is used
--FILE--
<?php
function test($x) {
	switch (@$x['y']) {
		case 1: return 'a';
		case 2: return 'b';
		case 3: return 'c';
		case 4: return 'd';
	}
	return 'e';
}
var_dump(test([]));
?>
--EXPECT--
string(1) "e"
